Punch



June 12, 1928. 1,673,244

J. E. HIRES ET AL PUNCH Filed March 25, 1925 Patented June 12, 1928.

UNITED STATES PATENT OFFICE.

JOHN E. HIRES, OF ARDMORE, AND HARRY LOTT JACOBY, OF WILLOW GROVE, PENN-SYLVANIA, ASSIGNORS TO HIRES, CASTNEB &. HARRIS, INQ, OF PHILADELPHIA,PENNSYLVANIA, A CORPORATION OF DELAWARE.

PUNCH.

Application filcd March 25, 1925.

This invention relates to punches for sheets of material, such as paper,celluloid, etc.

Punches which are positioned upon the periphery of synchronously gearedwheels,

to have a ball male die roll into a sharp edged female die, to shearholes in a sheet of paper, become inoperative from an elongated wearingaway of the edge of the hole in the female die, wearing some times inone direction and some times in the opposite direction, due to improperaxial alignment in the synchronism of the dies, as they come together.The main object of our invention is to provide a construction which willover come the elongated wear of the hole in the female die. This we doby holding either the male or the female die fixed on its rotor, andpermitting the companion die to yield for self adjustment on its rotor.

One embodiment of our construction for carrying out our invention isillustrated in the drawings, is hereinafter described, its operation isexplained and what we claim is set forth.

.111 the drawings, v

Figure 1 is a front elevation of a rotary ball punch embodying ourinvention.

Figure :2 is a side elevation of the same.

Figure 3 is an axial section of the rotor which holds the male dies.

Figure 1 is an axial section of the which holds the female dies.

Figure 5 an axial section of a cover holder for the female dies.

1* igure 6 is perspective view of one of the female dies.

Figure 7 is a side elevation of the body of the male die.

Figure 8 is a top plan of the body of the male die.

Figure 9 is a plan of a female die plate fragment, showing the form inwhich the hole is usually worn.

in the fi 'ures, 10 is a frame in which are journaled two shafts 11 and12. Equal meshing gears 13 and 14 are fixed to the respective shafts 11and 12. A pulley 15 is fixed upon the shaft 12. At the opposite ends ofthe shafts 11 and 12 are fixed respectively, the rotors 16 and 17. Therotor 16 is shown to have mounted upon the face thereof, the four maledies, 18, while the rotor 17 has mounted upon its face, the female dies19.

rotor Serial No. 18,134.

Each female die 19 has a cylindrical base 20. the body of which islarger than a half cylinder of the same. There is a neck 21 extendingtherefrom. A central hole 22 passes through the die. The bases 20 of thefemale dies 19, fit the cylindrical pockets 23 in the rotor 17. A.central, open, cylindrical pocket 2a is provided in the face of therotor 17, into which open holes 25, which are larger than andcommunicating with the holes 22, of the dies 19. A cover holder 26 has aplate portion 27, covering the dies 19, and has a flange 28 extendingover the dies 19 and the periphery of the disc portion-29, of the rotor17. Wide slots 30, are provided in the flange 28, which are looselyengaged by the necks 21, of the dies 19, permitting the die 19 to turn alittle in the pocket 23, when the die is self aligned by the ball of themale die. The cover holder 26 is secured by screws 31, to the rotor 17.

The rotor 16, which holds the male dies, has a disc portion 32 and acentral cylindrical extension 33, against which bear the four male diebodies 3 1, each held upon a screw 35. An extension 36, of the body 3 1,is secured to the disc portion 32, by a screw 37. The sides of the diebodies 34 are flat, 6

with the, exception of the tubular extension 38. having its outsidethreaded, to engage the thimble 39, for retaining the ball 40. Withinthe extension 38 is a compression spring 11 to keep the ball 40protruding through a hole in the end of the thimble 39, the hole beingsmaller than the balitt). The male ball dies 18 are positionedperipherally to co-ordinate with the female dies 19, as the rotors 16and 17 roll together. If it is desired to have the female dies 19,radially fixed upon the rotor 17, while permitting self adjustment tothe male dies 18, then the slots 30 in the flange 28, of the coverholder 26, are made to fit the necks 21 of the female dies 19, to holdthem from turning Within their respective cylindrical pockets 23, andthe screw 37 has its shank smaller than the hole in the extension 36, asshown in Figure 7. wherein the shank 37 of the screw 37 is shown smallerthan the hole 37 This permits an oscillation of the die body-3 1 aboutthe pivotal screw 35, giving play to the ball end of the die 18 for selfalignment with the female die 19, when the same is held from turning onthe rotor 17.

'22, while atthe same time in no way interfering with the rolling-inshearing action of the ball 40, with the die 19. The amount of movementof the oscillatory die is limited in practice to only that required forself alignment, and is so small as not to materially change the radialdistances of the operating part of the die from the center of the shaftof the rotor carrying the oscillatory die. The spring l1 permits anyradialadjustment required while maintaining a shearing pressure betweenthe ball 40 and the hole 22 of the female die 19. A table top 42 or anyother, suitable means may be provided to guide the material to the]punch to be perforated;

In regard to the mounting of the dies on the rotors, the 7 female diemay have a spherical or 'ball base end, instead of the cylindrical oneshown, in which case the shape of the pocket'in the rotor would bechanged to adapt it to fit the ball base. It ispossilole to fit the maleball die on a round e'nd'body adapted to turn in a pocket, like shownfor the female die, and have an ordinary fixed female die "in the lowerrotor.

Other changes in construction differing from those shown and describedmight be made without departing from the spirit and scope of ourinvention; We therefore do not wish to be limited to the one embodimentshown and described.

, We claim:

1. In a rotary punch having two rotors, upon which are mountedco-ordinating dies, adapted'to perforate sheet material, a die fixed onone rotor, aco-ordinating die pivotally mounted onthe'other rotor forself alignment withand by the die fixed on the other rotor.

ot-ally mounted on the other rotor for self alignment with and by thedie fixed on the otherrotor', and means limiting the oscillatorymovement of the pivotally mounted die.

3. A rotary punch comprising a frame,

two spaced shafts jou'rnale'd on the frame, a rotor mounted on eachshaft, dies on each rotor, said rotors being positioned, relative toeach other,.to have the dies on one rotor the round end dies, permittinga partial swinging movement to the said outer ends.

4. A rotary punch comprising a frame, two spaced shafts journaled'on'the f 'ame, a rotormounted on each shaft, dies on each rotor, saidrotors being positoned relative to each other to have the dies on onerotor roll into the dies of the other synchronous. ly, means connectedwith said adapted to turn said dies to co-ordinate in rolling action,the female die being fixed on its rotor, the male die comprising a diebody, pivoted on its rotor, an extension on said body having a holetherethrough transverse to the face of the rotor upon which the male dieis mounted, and a screw loosely engaging said hole and fixed in saidlast named rotor, the difference in size between the screw and the saidhole permitting sufficient oscillation to'the male die and limitingthesame for self alignment of said male.

die with said female die during the turning of the rotors.

JOHN E. HIRES. HARRY LOTT JACOBY.

shafts I llU

